Method of making panels



Oct. 28, 1958 M. F. GONSER METHOD OF MAKING PANELS Original Filed Nov.29, 1949 INVENTOR.

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METHOD OF MAKING PANELS Original Filed Nov. 29, 1949 I 5 Sheets-Sheet 5IN VEN TOR.

METHUD OF MAKING PANELS Milo F. tGonser, Seney, Mich, assignor to SemicoIncorporated, Seney, Mich, a corporation of Michigan riginal applicationNovember 29', 1949, Serial No. 130,097.. Divided and this applicationMarch 12,1954, Serial No. 415,903

1 Claim. (CI. 20-45) .house structure in which the individual elementsmaking up the completed construction are all constructed substantiallyentirely from wood.

A feature of the present invention resides in the provision of wallpanel constructions which are.not only of novel and improved form, butwhich are extremelysimple to. manufacture and which are provided withnovelmeans on'the lateral side edges thereof for mating one panelthereof with the next adjacent panel inorder to provide a substantiallycontinuous wall structure around'the entire periphery of the building.

Still further, the present invention contemplates the provision of wallpaneling structures, some of which may include doors, windows or otheropenings in which the panels are all provided with a tongue and groovearrangement at their upper and lower marginaledges in order tofacilitate the mounting thereof in final position.

Still further, the invention contemplates the provision of aconstruction and arrangement of prefabricated parts which can be simplyand conveniently erected by relatively unskilled labor and witha'minimum of subsequent finishing operations, thereby greatlyexpeditingthe completion of the finished structure.

Many-other and further objects, advantagesand features will becomeclearly apparent 'from' the following specification when considered inconnection with the accompanying drawings forming a part thereof.

In the drawings: Figure 1 is a perspective view of one form-ofprefabricated house structure constructed in accordance with theteachings of the present invention;

Fig. 2 is an enlarged vertical sectional view withjportions broken away,illustrating the cross sectional configuration and arrangement ofelements of a typicalsection through the side wall of the improvedbuilding structure shown in Fig. 1;

Fig. 3 is an enlarged cross sectional view taken substantially on theline 3-3 of Fig. 1, withportions broken away to illustrate in furtherdetail the construction and arrangement of the side wall panels of thehouse with respect to the foundation andthe mountingof thereof .Sttatent O sectional view taken substantially on the line 5-5 of Fig. 1,illustrating in further detail the construction and arrangement of thewall panels when permanently mounted in place;

Fig. 6 is a fragmentary cross sectional view of a modified form ofcorner construction; I

Fig. 7 is a diagrammatic view of a typical floor plan of the buildingstructure shownv in Fig. 1;

Fig. 8 is a perspective view of the foundation structure on which theprefabricated housing construction of the present invention is adaptedto be mounted;

Fig. 9 is an enlarged, fragmentary cross sectional view, takensubstantially on the line 99 of Fig. 8, illustrating in detail theconstruction and arrangement of the upper portion of the foundationwall; I

Fig. 10 is a fragmentary perspective view of a portion of the floorjoist mounted in position, showing in detail the construction andarrangement of the floor supporting elements; I I

Fig. 11 is a fragmentary cross sectional view taken along the line11--11 of. Fig. 10, illustrating in detail the mounting and location ofthe floor supporting elements;

Fig. 12 is a fragmentary perspective view, similar to Fig. 10, showingthe floor panels mounted in position on the floor supporting members;

'Fig. 13 is a perspective view of a typical floor panel, a plurality ofwhich are utilized for the purpose of making up the interior flooring ofthe housing structure;

Fig. 14 is a fragmentary perspective view, similar to.

Figs. 10 and 12, showing the wall supporting molding element mounted inposition on the floor structure;

Fig. 15 is a fragmentary perspective view with portions broken away,similar to Figs. 10, 12 and 14, showing the manner in which theindividual wall panels are mounted; Fig. 16 is an enlarged perspectiveview of one of the typical wall panels which constitute an importantpart of the present invention;

Fig. 17 is a fragmentary sectional view with portions broken away, takenon the line 17-17 of Fig. 16, illustrating in detail the manner in whichthe several layers of the typical wall panels are offset from eachother;

Fig. 18 is a'fragmentary perspective view illustrating in detail themanner in which the upper marginal edges of the wall panels are anchoredtogether in order to provide a complete unitary and integralconstruction;

Fig. 19 is a fragmentary perspective view, similar to Y Fig. 18,illustrating the manner in which the roof truss elements are mounted onthe upper portion of the wall paneling structure, and in general, themanner in which the roof elements are assembled;

Fig. 20 is a fragmentary perspective view, similar to Figs. 18 and 19,illustrating the manner in which the roof panels are mounted on the rooftruss elements; t

Fig. 21 is a sectional view of an interior partition, illustrating theassembly of'the panels thereof;

Fig. 22 is a sectional view of the interior partition,

taken on the line 2222 of Fig. 21;

Fig. 23 is an elevational view of a typical roof truss gable sectionsand the manner in which the same is cut to form a pair of gablesections; and

Fig. 27 illustrates in elevation the manner in which the gable sectionscut from the panel shown'in Fig. 25- may be arranged to form a completeclosure of the gable end of the prefabricated structure.

With more particular reference to the drawings, it will be readilyapparent that while the improved building structure of the presentinvention has many and various novel features not heretofore disclosed,there are, however, a number of more or less conventional constructionsand arrangements of parts which may very simply and conveniently beincluded for the purpose of providing an easily assembled and compactfinal product.

Referring now to Figs. 8 and 9 of the drawings, it will be readilyappreciated that the foundation construction is more or lessconventional in form and is illustrated herein merely for the purpose ofproviding a complete structure embodying the features of applicantsinvention. This foundation construction may be formed of brick,reinforced concrete, or, as illustrated in Fig. 9, of conventionalconcrete blocks 1. This foundation merely constitutes a wall elementdefining the outer periphery of the housing structure to be erected andmay include a cenral reinforcing wall 2 if the building is of such asize as to require additional support for the floor joists hereinafterdescribed. This foundation construction is in all respects conventionalin its form and erection and it is merely essential that it properlydefine the outline of the floor plan of the building to be completed,and be in all respects level on its up er surface. At the time theblocks making up the foundation are laid, suitable bolts 3 may beembedded in the concrete from which the foundation is formed, and thesebolts may be employed for the purpose of anchoring thereto wooden baseor plate members 5 which substantially cover and enclose the uppersurface of the wall structure making up the foundation. After theseplate members have been anchored in place, suitable wooden floor joistsare utilized for constructing the floor supporting structure which,while being somewhat conventional in form, has unique features whichrender it particularly simple and easy of construction.

In the prefabrication of houses of this general character, it will beappreciated that a suitable supply of entirely pre-cut and pro-finishedelements will be supplied for erecting the floor supporting structure.The number and dimension of these various elements will be determined bythe precise sizes and configuration of the particular floor plan of theprefabricated house being consructed.

In the particular construction shown, a plurality of longitudinallyextending wooden 2 x S joist members 6 are provided, cut properly tolength so that they will extend substantially from one end of the floorstructure to the other. Additional transversely extending 1 x 8 plankingelements 7 are provided which, when anchored to the extreme outward endof the outermost of the joist members, will provide a continuous wall ofplanking extending upwardly from the foundation and of a size equal tothe floor supporting structure and extending entirely around the outerperiphery of the foundation. A sufficient supply of spacing elements 8are all cut to size in order that the joist members making up thefoundation may be equally spaced at the proper intervals and supportedin the desirable vertical position, once they have been properly mountedin place.

These spacing members 8 may be directly nailed to the planking elements7 which connect the two outermost joist members 6 and thus provide meansfor accurately locating and mounting the terminal ends of theintermediate joist members in the predetermined desired position. Atsuitable intervals throughout the length of the building structure, thejoist members may have nailed thereto additional spacing members 3 inorder that the intermediate portions of the joist members may besupported in the desired vertical position and maintained in properlyspaced relationship in order to give the necessary rigidity to supportthe floor panels hereinafter described.

After completion of the floor supporting structure de sions of thesepanels being controlled so that a sufficient number of panels aresupplied to wholly and completely cover the entire floor supportingstructure with the marginal edges of these panels lying flush wiih theexterior surface of the joists and planking defining the periphery ofthe floor supporting structure. The mounting of these panels inpredetermined position is shown in Fig. IQ of the drawings.

Each of these floor panels 9 is preferably composed of an upper layer 10and a lower layer 11 of wooden boards, preferably having the boards ofone layer running in a direction at right angles to the boards making upthe other layer in order that the floor panel will be of maximumstrength and rigidity. Interposed between the layers of boards 10 and 11is a layer, or, if desired, a plurality of layers 12 of conventionalinsulating building paper or felt. After the boards making up the layers10 and 11 are arranged in precise superimposed relation to each otherwith the insulating paper therebetween, this entire panel may be securedin permanently assembled relationship by nailing the boards of one layerto the boards of the other layer. The lower boards are preferably 1"thick, the top board one-half that, although the thickness may vary andbe the same in the top and bottom boards.

This operation may be easily and conveniently performed by providing anassembly jig (not shown) having a steel base plate. The panels are fourfeet or multiples of 16 in width and variable lengths to meet therequirement of each structure. This jig may properly define the outerconfiguration of the floor panel to be assembled and the initial layerof boards 11 laid in the jig on the surface of the steel panel.Thereafter, a suitable section of building paper or felt is cut to size,inserted in the jig, and the second layer of boards mounted in the jigon top of the paper. This jig is preferably provided with means tolocate the individual boards making up each of the layers in preciselythe desired relation in order that the finally completed panel will havethe external dimensions thereof accurately and precisely controlled.After these elements have been assembled in this jig, nails may bedriven directly through the upper layers of boards, through the paperand through the lower layer of boards, the steel plate serving to clinchthe nails on the lower side and lock the two layers in proper assembledrelation as if riveted together.

These individual panels 9 are nailed to the floor support ing structureand it will be apparent that this entire floor and floor supportingstructure may be completely assembled on the foundation in a minimum oftime without skilled labor and without the necessity of utilizing anybut a minimum of the most elementary tools and equipment.

The building has now reached the stage of completion where the entirefloor supporting structure is mounted on the foundation and in which theentire floor supporting structure has covering, providing a level andcontinuous floor.

After completion of this stage of construction, sole plate elements 13are nailed in place around the entire outer periphery of the floorstructure and are nailed directly to the upper surface of the floorpanels and preferably through to the floor supporting joist below or toplates in the concrete if a concrete floor is provided. These soleplates are all generally inverted T-shape in cross section and have atransverse width exactly equal to the transverse thickness of the wallpanels described in detail below and shown in the perspective view, Fig.17 of the drawings.

identical in width, length and thickness.

dhewvafii panels wniehsaak'e up the entire wall struct l'ife "of thepresent prefabrieat'ed housing construction are of rather ni'que'for maria play 'a'n i-rnpo'rta'n't part in th'e prov'ision "or-a wallc'turewhich entirely eliminates the use of the convent nals'tudding'but whichat the same time has 'stren'g'th'and thermal'chara'cteristics supein ahorizontal directionat'substantially right angles to the boards of "theinner and outer layers. In addition, suitable layers of building paper17and "18 are provided substantially coextensive with the layers of boardswith which they are associated, one or these layers of insulatingbuilding pa'pe'r being provided between the inner layer-f boards and theintermediate layer of boards, and the other located between the outerlayer of boards a'nd'th'e intermediate layer of boards substantially inthe relationship illustrated Fig."17 of the drawings. These three layersof boards whichmake up the individual wall panels r'n'ay beass'ernbledin a manner generally similar to that described in Connection with "theassembly of the "floor "panel elements 9 referred to above. Theparticular jig required for the assembly of these wall panels,hdwjeve'rfis "necessarilyone which will provide the layers with'the'precise desired amount of the magnitude of this offset beingsubstantially equal to the thickness of one of the layers of boardsmaking up the panel and in this connection attention is drawn to thefactth'at each of the layers 14, 15 and 16 is substantially IConsequently, this vertical offset above described allows theintermediate panel to'protrude an amount about'equal to its thicknessabove the upper marginal edges of the panels 14 and 15, thusproviding atongue structure throughout the 'upper marginal edge of the completedpanel. Similarly, this offset results in the inner and outer panelsextending below the lower marginal edge of the intermediate panel 16,thus providing a groove structure generally designated 19 throughout thelower marginal edge of the completed panel. In addition to this verticaloffset above described, the inner panel 14 is offset laterally withrespect to the intermediate panel in one direction and the outer panelis similarly offset laterally in the opposite direction from theintermediate panel, thus providing a generally stepped formation in eachof the lateral marginal edges of the panel. The magnitude of these twolast mentioned ofisets is substantially equal to double the thickness ofone. of the layers of the completed panel so that when adjacent panelsare mounted with their lateral marginal edges together, a :jointtherebetween will-be formed substantially as shown at 20 in Fig. 4 ofthe drawings. 7

It is apparent that these panels may be easily fabricated and completedat the lumber mill where theprefabricated parts of the housing structureare constructed, and that all panels may be constructed of identicalvertical height.

However, various of the panels may be made in dilferent lateraldimensions to facilitate the location of the various doors and windowsin the finally completed housing structure and at the same time topermit a reasonable amount of variation in the door and windowarrangements in a particular housing structure. For example, thesepanels may be conveniently formed in widths of 2, 3, 4 and 6 'feet'inorderthat the maximum amount of variation in the'final wall structuremay be obtained with a minimum numberbf pan'eltypes. Certain of'the'pa'nels may include window frames 21 therein which a't=-the'timethe panels are prefabricated 'will-merely-incl-ude -a planking venientlybe assembled from completely prefabricated parts.

The panels whichjoin at any one corner of the house may, if desired, beprefabricated in a manner slightly different from that described abovein that in these panels themagnitude or the offsets at the marginal edgethereof is reduced to half the amount previously described, whereby twoadjacent'wallpanels may be fitted-together to provide a jointsubstantial-lysuch as that 'shown'atzl in Fig. 4. If, howeverrit is"desired to use wall-panels having 'a construction such as that shown inFig. 16' of the drawings throughout the house construction, these panelsmay be supplied with filler strips 23' and 24 which, when applied to thepanels, will result in a joint substantially similar to that shown at 25in the modification illustrated in Fig.76 of the drawings. The stripshave paper attached to-the inner face by "staples, adhesive, tacks orother means.

Inasmuch each 'of the-individual wall panels making up the housingstructure is provided with a generally grooved lower marginal edge, itwill be seen by reference "ery of thefloor structure, which'wall will'be'mated thereto in adapted to receive the tongue 27 and having sidewalls adapted to abut against the upper ends of the inner and outerpanels 14 and 15 may be nailed to these wall panels, as is clearly shownin Fig. 2 of the drawings. The side walls of this cap plate member 28will lie flush with the inner and outer surface of 'the wall panels toprovide a relatively smooth external surface at this point and willalign the panels at thetop.

A relatively heavy planking member 29, preferably a two by ten or two bytwelve, is then secured to the cap plate 28 and the outer surface of thewall panels, which planking member may be provided in suitable pre-cutlengths in order to extend as a substantially continuous supportingelement around the 'entire periphery 'of the building with its uppermarginal edge lyingflush with the base of the cap plate 28, as isclearly seen in Figs. 2 and 3. Along the front and rear walls of thebuilding, a plate'element 3th is nailed tothe cap plate '28 andplanking29 and extends outwardly therefrom to provide the necessary overhangingor gable for the roof structure hereinafter described below. The band ofplanking 29 serves to provide additional functions which are importantto the rigidity 'of'the building construction. By reference to Fig. 2 itwill be seen that the elements 21'which define the window openings liewith their side walls flush with the inner and outer walls of the wallpanel in which they are mounted. Suitable prefabricated window frames,generally designated at 31, may be provided which freely fit into theseopenings and, as will be noted from Fig. 2 of the drawings, the upperportion of the window frame 31 lies flush with the exterior surface ofthe wall panels in which the Window frames are mounted. These windowframe elements do, however, have the side trim strip 32 attached theretoprotruding laterally a substantial amount beyond the edge of the windowopening in which the windows are mounted. The side trim strips 32terminate at their upper end at a point where they will directly engageand abut the lower mar ginal edge of the adjacent planking element 29,thus firmly locating and squaring the window frame in position withinthe window opening.

This construction serves not only to provide an accurate and precisemounting for the window frame, but serves to provide additional rigidityand support for the panel in which the window frame is mounted andserves to provide a precise means for locating the window frame in itspredetermined finally desired position. All of the window frames anddoor frames are completely prefabricated at the factory in substantiallyfinally finished condition and inserted in the openings provided in thevarious wall panels in order that these windows and doors may be mountedin the building structure with a minimum of time, effort, and the workmay obviously be done by relatively unskilled labor.

In order to assemble the roof structure on the improved buildingconstruction described above, it will be seen that the plate element 30is mounted in position on opposite sides of the building in the mannerabove described. This plate element 30 serves to support a plurality ofroof trusses, generally designated 33, shown in elevation in Fig. 23 ofthe drawings.

Each of these roof trusses is constructed in the manner shown in Fig. 24of the drawings, that is, they comprise two rafter elements 34, each ofwhich is composed of a three layer thickness of boards. The truss alsoincludes a ceiling joist 35 similarly composed of three layers of boardstogether with a main central strut brace 36 and side strut braces 37 ofsingle board construction. As will be seen by reference to Fig. 24, theend of the intermediate board member of the ceiling joist is cut off atan angle short of the ends of the outer element to provide a recessadapted to receive the protruding tongue 38 formed on the lower end ofthe element 34, which tongue is formed by cutting oflf at an angle theouter ends of the two outer boards which make up the element 34.Similarly, the various strut braces 36 and 37 have the ends cut off tomate with the rafter elements and the ceiling joist. The strut brace 36is positioned vertically at the ridge point and the strut braces 37extend from each rafter mid-span to the ceiling joist abutting the sidesof the strut brace 36. It will be clearly apparent from a considerationof the construction described that each of these individual trusselements may be completely assembled and secured in the form shown inFig. 21 in a relatively short time on the site. These individual trusselements span the entire transverse width of the building and rest onthe plate element 30, as shown in Fig. 20.

After all of these elements have been mounted in position, a l x 6planking element 39 is nailed to the outer marginal edge of the platemember 36 and also nailed to each of the truss elements described above.This planking element 39 may have spacers 8 applied thereto to preciselylocate the ends of each of the truss elements in predetermined assembledcondition in the spaces therebetween. The ends of the truss elementssupport a filler and drip strip 40 shown in Fig. 20, which strip runsthroughout the entire length of the building on each side thereof andserves to continue the lower marginal edge of roof panels 41 which maybe formed substantially similar in construction to the floor panelsdescribed above and which may be supplied in standard sizes and shapesso that they may be utilized to completely cover the entire roof trussstructure. The panels 41 are mitered at the ridge point to form avertical abutting joint and are four feet or multiples of sixteen inchesin width and variable lengths to meet the requirements of each building.

A single large panel 42 may be fabricated in much the same manner as theroof panels described above, to form the two gable panels. This largepanel, after being fabricated with the necessary building paper betweenthe two layers, may be sawed along the line 43 to form two panels 44 and45, which, when arranged in the manner shown in Fig. 24, may be utilizedto enclose the gable end walls of the building structure, these panelsprecisely fitting in the space provided for them. After completion ofthe building structure in the manner described above, the entire outerwall surface may be additionally covered with any type of finishingmaterial, and by way of example paneling 46 is illustrated applied inthe manner shown in Fig. 5 running in a vertical direction, but it is tobe understood that the paneling may run in a horizontal direction.Brick, stucco and similar facing materials may also be employed.Similarly, the roof may be covered with shingles, roofing paper, orother similar material. A drip cup 46 is applied to the top of theplanking elements 29, as illustrated in Fig. 2.

Referring to Fig. 7, partitions 47 are illustrated for dividing thefloor space within the building. The elements of the partition are madeof the same material and substantially in the same manner as the sidepanels above referred to, with slight modifications.

Referring to Figs. 21 and 22, a partition 47 is illustrated, made up ofpanels 48, each consisting of two outer layers of boards 49 the grain ofwhich runs in a vertical direction and an inner layer of boards 52disposed therebetween with the grain running horizontally at rightangles to the boards 49. Jigs are provided for accurately locating theboards on a steel plate, after which they are nailed together on theplate which clinches the nails in rivetlike position for holding theboards to make a three-ply panel. The boards are selected of suchdimension and the jig is so constructed as to have the assembly of theinner boards 52 of less height than the inner and outer boards 49,thereby providing a groove 51 both at the top and at the bottom of thepanel. It might be noted at this point, as mentioned above, that theouter panels may be constructed in the same manner by having a groove 51in the top edge thereof instead of the tongue 18. When top grooves areutilized, the sole plates 13 may be employed at the top the same as atthe bottom. This plate 13 is employed for aligning and strengthening thetop of the partition panels 47.

The partition panels 47 are constructed in a modulus of Widths,preferably 5", 7", ll", l3", l6", 2 ft. and 4 ft., with a tongue 53along each side which is approximately 2" long. With such a modulus ofWidths, all partitions may be assembled on the site, with the necessityonly of sawing the tongue to have the partition accurately fit inbetween two walls. It will be noted in Fig. 21 that the tongue 53adjoining the left-hand wall of the building has filler strips 54 addedon each side thereof to complete the thickness of the panel adjacent tothe wall. The left-hand end of the second panel 48 has its tongue 53spaced from the tongue 53 of the panel 48 adjacent to the wall by thefiller strips 55'. The joint is substantially strengthened by thenailing of the filler strips to the tongues.

A partition 56 at right angles to the partition 47 is also illustratedin the figure. The length of the tongue 53 was reduced by ripping aportion therefrom so that the assembly of panels 48 would fit betweenthe partition 47 and the wall. Filler strips 57 are nailed to theremaining portion of the tongue 53 to continue the outside layer of thepanels to the partition 48. Nails are then driven through the partition48 into the abutting edge of the partition 56 to retain the partition inposition. Similarly, the end partition 58 has filler strips 59 appliedto the tongue 53 to provide a butt end to the end panel of thepartitions 58. The tongue 53 of the right-hand panel 48 in a like mannerhas been ripped to correct length and has filler strips 61 nailedthereto. Nails or spikes are then driven through the right-hand panel 48into the butt end of the panel 58. By having various widths of panels 48and by treating the tongue 53 in the manner illustrated, that by spacingthe tongue or ripping the tongue to produce the proper lengths, and byemploying filler strips, any length of partition may be assembled withinthe building.

Plaster over wood on metal lathe or rock board may be employed to finishthe surface of the panels, or suitable trim board may be applieddirectly thereto for finishing the walls. The same finish boards orceiling boards or plaster may be applied to the rafters 35 in theconventional manner. A chimney may be added to the building which may beof the prefabricated type supported on the ceiling joists 35 or from theground, or a brick or block chimney of conventional form may be utilizedin the conventional manner either on the interior or exterior of thebuilding. The chimney may be of the multiple flue type so that it mayalso service a fireplace which may be added by cutting a portion of thewall panel away sufiicient to provide the fireplace opening.

The surface of the interior layer of the boards may be broken by achannel 63 which is routed therein and in which a pair of insulatedwires of a form to pass the electrical code may be laid for sealing thewires from above the ceiling which drop downwardly to baseboard or walloutlets and to switches located adjacent to the doors. The receptaclebox may be located any place along the slot at a desirable height abovethe floor by cutting an opening into the wall panel of a depth toreceive the box in which the switch or outlet is supported. The slotsconceal the wire on the inner surface of the building, eliminating theuse of expensive and unsightly conduits and substantially reduce thecost for installing the wiring, switches and outlets within thebuilding.

Referring to Fig. 25, it will be noted that the panels forming the sidesof the building may have a slot 50 provided centrally along the top edgein place of the tongue 18, in which case the sole plate 13 is employedin inverted arrangement as the cap plate, as pointed out hereinabove.

From the foregoing it will be seen that the building structure describedabove is not only one which can be most easily and convenientlyassembled to form a finished housing structure, but one which is made upof elements which may be very simply and cheaply prefabricated at thepoint of manufacture. It is also obvious that the interior partitioningof the building structure may be prefabricated at the point ofmanufacture in such modulus of widths that any length or type ofpartitions may be assembled within the building on the site.

It will be apparent that the structure described above is merelyillustrative of one embodiment of the invention which may be constructedin accordance with the teachings of the present invention and thatother, further and various embodiments of the inventive ideashereinbefore disclosed may be made without departing from the spirit andscope of the invention defined in the following claim.

What is claimed is:

The method of making a three ply Wall panel having tongue and groovedoposite edges, which includes the steps of, providing a jig assembly todefine the edges of said panel, positioning a plurality of boards withinsaid jig to form a layer having the edges thereof defined by said jig,placing a sheet of building paper over said layer, positioning aplurality of boards Within said jig to form a second layer having theedges thereof defined by said jig in olfset relation with the firstlayer, placing a sheet of building paper over the second layer,positioning a plurality of boards within said jig to form a third layerhaving the edges thereof defined by said jig in offset relation with thesecond layer, joining the three layers firmly together to form one threeply wall panel, and removing the jig from the edges of the panel.

References Cited in the file of this patent UNITED STATES PATENTS187,502 Banker Feb. 20, 1877 304,531 Lee Sept. 2, 1884 471,944 Brunhamet al. Mar. 29, 1892 1,375,402 McAvoy et a1. Apr. 19, 1921 1,660,480Daniels Feb. 28, 1928 1,779,325 Manning Oct. 21, 1930 2,295,248 WittnerSept. 8, 1942 2,629,139 Thelander Feb. 24, 1953- FOREIGN PATENTS 179,990Switzerland Apr. 10, 1935

